Speed Controllers are equipped with a push-in function that helps to regulate airflow to control the operational speed in pneumatic circuits. The push-in function provides the flow control valves for connecting or disconnecting the tubing easily. Speed Controllers which is also known as Flow control valves control flows in one direction, allowing free flow in the opposite direction. A finely threaded stem allows gradual alteration of the amount of controlled flow passing through the valve. Control-in and Control-out are both available.